/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_invite.c: Invites the user to join a channel.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: m_invite.c 287 2006-02-16 06:31:29Z jon $
 */

#include "stdinc.h"
#include "tools.h"
#include "handlers.h"
#include "common.h"
#include "channel.h"
#include "channel_mode.h"
#include "list.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "s_serv.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"

static void m_invite(struct Client *, struct Client *, int, char *[]);

struct Message invite_msgtab = {
	"INVITE", 0, 0, 3, 0, MFLG_SLOW, 0,
	{m_unregistered, m_invite, m_invite, m_ignore, m_invite, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
	mod_add_cmd(&invite_msgtab);
}

void
_moddeinit(void)
{
	mod_del_cmd(&invite_msgtab);
}

const char *_version = "$Revision: 287 $";
#endif

/*
** m_invite
**      parv[0] - sender prefix
**      parv[1] - user to invite
**      parv[2] - channel name
**      parv[3] - invite timestamp
*/
static void
m_invite(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	struct Client *target_p = NULL;
	struct Channel *chptr = NULL;
	struct Membership *ms = NULL;

	if(IsServer(source_p))
		return;

	if(*parv[2] == '\0')
	{
		sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
			   me.name, source_p->name, "INVITE");
		return;
	}

	if(MyClient(source_p) && !IsFloodDone(source_p))
		flood_endgrace(source_p);

	if((target_p = find_person(client_p, parv[1])) == NULL)
	{
		sendto_one(source_p, form_str(ERR_NOSUCHNICK), me.name, source_p->name, parv[1]);
		return;
	}

	/* Do not send local channel invites to users if they are not on the
	 * same server as the person sending the INVITE message. 
	 */
	/* Possibly should be an error sent to source_p */
	/* done .. there should be no problem because MyConnect(source_p) should
	 * always be true if parse() and such is working correctly --is
	 */
	if(!MyConnect(target_p) && (*parv[2] == '&'))
	{
		if(ConfigServerHide.hide_servers == 0)
			sendto_one(source_p, form_str(ERR_USERNOTONSERV),
				   me.name, source_p->name, target_p->name);
		return;
	}

	if((chptr = hash_find_channel(parv[2])) == NULL)
	{
		sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL), me.name, source_p->name, parv[2]);
		return;
	}

	if(MyConnect(source_p) && (ms = find_channel_link(source_p, chptr)) == NULL)
	{
		sendto_one(source_p, form_str(ERR_NOTONCHANNEL),
			   me.name, source_p->name, chptr->chname);
		return;
	}

	if((chptr->mode.mode & (MODE_INVITEONLY | MODE_PRIVATE)))
	{
		if(MyConnect(source_p) && !has_member_flags(ms, CHFL_OWNER | CHFL_PROTECTED |
							    CHFL_CHANOP | CHFL_HALFOP))
		{
			sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
				   me.name, source_p->name, chptr->chname);
			return;
		}
	}

	if(IsMember(target_p, chptr))
	{
		sendto_one(source_p, form_str(ERR_USERONCHANNEL),
			   me.name, source_p->name, target_p->name, chptr->chname);
		return;
	}

	if(MyConnect(source_p))
	{
		sendto_one(source_p, form_str(RPL_INVITING), me.name,
			   source_p->name, target_p->name, chptr->chname);

		if(target_p->away)
			sendto_one(source_p, form_str(RPL_AWAY),
				   me.name, source_p->name, target_p->name, target_p->away);

 	    if(chptr->mode.mode & MODE_INVITEONLY)
		{
			if(chptr->mode.mode & MODE_PRIVATE)
			{
				/* Only do this if channel is set +i AND +p */
				sendto_channel_local(CHFL_OWNER | CHFL_PROTECTED |
						     CHFL_CHANOP | CHFL_HALFOP, NO, chptr,
						     ":%s NOTICE %s :%s is inviting %s to %s.",
						     source_p->name, chptr->chname, source_p->name,
						     target_p->name, chptr->chname);
				sendto_channel_remote(source_p, client_p,
						      CHFL_OWNER | CHFL_PROTECTED | CHFL_CHANOP |
						      CHFL_HALFOP, NOCAPS, CAP_TS6, chptr,
						      ":%s NOTICE %s :%s is inviting %s to %s.",
						      source_p->name, chptr->chname, source_p->name,
						      target_p->name, chptr->chname);
				sendto_channel_remote(source_p, client_p,
						      CHFL_OWNER | CHFL_PROTECTED | CHFL_CHANOP |
						      CHFL_HALFOP, CAP_TS6, NOCAPS, chptr,
						      ":%s NOTICE %s :%s is inviting %s to %s.",
						      source_p->name, chptr->chname, source_p->name,
						      target_p->name, chptr->chname);
			}
		}
	}
	else if(parc > 3 && IsDigit(*parv[3]))
		if(atoi(parv[3]) > chptr->channelts)
			return;

	if(!MyConnect(target_p) && ServerInfo.hub && IsCapable(target_p->from, CAP_LL))
	{
		/* target_p is connected to a LL leaf, connected to us */
		if(IsClient(source_p))
			client_burst_if_needed(target_p->from, source_p);

		if((chptr->lazyLinkChannelExists & target_p->from->localClient->serverMask) == 0)
			burst_channel(target_p->from, chptr);
	}

	if(MyConnect(target_p))
	{
		sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
			   source_p->name, source_p->username,
			   source_p->host, target_p->name, chptr->chname);

		if(chptr->mode.mode & MODE_INVITEONLY)
		{
			/* Add the invite if channel is +i */
			add_invite(chptr, target_p);
		}
	}
	else if(target_p->from != client_p)
		sendto_one(target_p, ":%s INVITE %s %s %lu",
			   ID_or_name(source_p, target_p->from),
			   ID_or_name(target_p, target_p->from),
			   chptr->chname, (unsigned long) chptr->channelts);
}
